99 expy bad idle
Thread Starter
|
Senior User
Joined: Mar 2009
Posts: 100
Likes: 0
99 expy bad idle
99 expy 4.6 liter 4x4 , i start it up in the morning or anytime if it sits a while and it runs fine for a sec or 2 then it just chuggs and runs ruff for like 30 seconds to a min then goes back to normal , sometimes if i go to move it wile its doing this it will die , new plugs and wires and coils , no check engine light , im not sure ware to start lookin , any help would help me out , thanks
Senior User
Joined: Feb 2009
Posts: 491
Likes: 4
From: Southern Illinois
Bad fuel possibly? Has this happened since a recent refueling? My other thought is intake: dirty filter, sticky throttle body, cleaning the throttle body and intake in general. I'm no expert but that's where I'd start if it was mine.
Thread Starter
|
Senior User
Joined: Mar 2009
Posts: 100
Likes: 0
this has happened sence i got it and its just buggin me , no ive tried diffrent gas stations and diffrent octanes and no change , i did resontly try a fuel treatment cleaner thing to maybe help and nothin , i did also wd-40 the throttle body ( sounds funny i know but someone else said maybe a sticking throttle body and its the only thing i could think of ) also took the TB off and cleaned the crap out of it with carb cleaner , new air filter also , havent checked the EGR yet , im thinking and leaning twards a EGR valve or mas air or o2sensor or maybe even a fuel filter , and ideas how to narrow it down ?
